Elegug is Welsh for guillemot which, along with fulmars, razorbills, kittiwakes and lesser black-backed gulls, are residents of these two impressive limestone stacks that rise from the sea just off Castlemartin Cliffs.

The Pembrokeshire Coast Path takes you past the stacks and the nearby Green Bridge of Wales, a limestone arch and one of South Wales’ most stunning natural landmarks. A couple of miles to the south-east, tucked away at the base of the cliffs, is the tiny 13th-century St Govan’s Chapel, built on the site of a holy well and accessed by a flight of steps down the cliffs.

The stacks are located within the MoD Castlemartin Firing Range, so access is limited at times, yet despite the bangs from the boys with their toys, the lack of other human activity on the range has allowed adders and voles to thrive here.